fix(cli): explicitly set memory_service_uri='memory://' when --in_memory is passed

When `adk run --in_memory` is used, `_setup_runner_context` sets `session_service_uri` and `artifact_service_uri` to `'memory://'`, but previously omitted `memory_service_uri`. While `create_memory_service_from_options(None)` currently defaults to in-memory, setting `memory_service_uri='memory://'` explicitly ensures that user intent is preserved across all state services and is not superseded by platform auto-configuration.

Co-authored-by: William Denniss <wdenniss@google.com>
PiperOrigin-RevId: 974115133

Author: WilliamDenniss

src/google/adk/cli/cli.py

@@ -312,6 +312,7 @@ def _setup_runner_context(
   if in_memory:
     session_service_uri = 'memory://'
     artifact_service_uri = 'memory://'
+    memory_service_uri = 'memory://'
     use_local_storage = False
 
   session_service = create_session_service_from_options(

tests/unittests/cli/utils/test_cli.py

@@ -549,3 +549,39 @@ def test_print_event_preserves_non_ascii_in_jsonl(
   assert len(echoed) == 1
   assert "日本語の回答" in echoed[0]
   assert "\\u" not in echoed[0]
+
+
+@pytest.mark.asyncio
+async def test_run_cli_in_memory_flag_sets_memory_service_uri(
+    fake_agent, tmp_path: Path, monkeypatch: pytest.MonkeyPatch
+) -> None:
+  """run_cli with in_memory=True should configure memory_service_uri='memory://'."""
+  parent_dir, folder_name = fake_agent
+  input_json = {"state": {}, "queries": []}
+  input_path = tmp_path / "in_memory_input.json"
+  input_path.write_text(json.dumps(input_json))
+
+  captured_factory_args: dict[str, Any] = {}
+
+  def _memory_factory(
+      *,
+      base_dir: Path | str,
+      memory_service_uri: str | None = None,
+  ) -> object:
+    captured_factory_args["memory_service_uri"] = memory_service_uri
+    return object()
+
+  monkeypatch.setattr(
+      cli, "create_memory_service_from_options", _memory_factory
+  )
+
+  await cli.run_cli(
+      agent_parent_dir=str(parent_dir),
+      agent_folder_name=folder_name,
+      input_file=str(input_path),
+      saved_session_file=None,
+      save_session=False,
+      in_memory=True,
+  )
+
+  assert captured_factory_args["memory_service_uri"] == "memory://"